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Yes, it was fairly common during WWII to use salves to protect the face from frostbite. I know some skiers that recommend it too.
The "experts" don't recommend it as it can lead to a false sense of security, but if the snow is blowing it can melt on your face and the moisture increases heat loss leading to frostbite. The vaseline creates a barrier to keep the moisture off the skin.
The same goes for chickens. High humidity can lead to frostbite because the moisture freezes and settles just like frost on the birds where it melts and moistens their exposed areas. Vaseline can seal out the moisture.
Yes, it was fairly common during WWII to use salves to protect the face from frostbite. I know some skiers that recommend it too.
The "experts" don't recommend it as it can lead to a false sense of security, but if the snow is blowing it can melt on your face and the moisture increases heat loss leading to frostbite. The vaseline creates a barrier to keep the moisture off the skin.
The same goes for chickens. High humidity can lead to frostbite because the moisture freezes and settles just like frost on the birds where it melts and moistens their exposed areas. Vaseline can seal out the moisture.